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我们必须投资于不仅能提高效率而且能减少环境影响的技术。
We must invest in technology that not only improves efficiency but also reduces environmental impact.
The voice is an instrument that everyone has.
Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.
教育不仅仅是达到目的的手段,其本身就是目的。